<template>
  <div>
                 <!-- 面包屑导航区域 -->
     <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>添加商品</el-breadcrumb-item>      
     </el-breadcrumb>
     <!-- 卡片视图 -->
     <el-card>
     <el-alert
     title="添加商品信息"
    type="info"
    show-icon
    center
    :closable="false">
  </el-alert>
  <!-- 步骤条 -->
  <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
  <el-step title="基本信息"></el-step>
  <el-step title="商品参数"></el-step>
  <el-step title="商品属性"></el-step>
  <el-step title="商品图片"></el-step>
  <el-step title="商品内容"></el-step>
  <el-step title="完成"></el-step>
</el-steps>
  <!-- 标签栏区域 -->
  <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position='top'>
  <el-tabs :tab-position="'left'" v-model="activeIndex" :before-leave="beforeTabLeave" @tab-click="tabClicked">
    <el-tab-pane label="基本信息" name="0">
        <el-form-item label="商品名称" prop="goods_name">
            <el-input v-model="addForm.goods_name"></el-input>
        </el-form-item>
         <el-form-item label="商品价格" prop="goods_price">
            <el-input v-model="addForm.goods_price" type="number"></el-input>
        </el-form-item>
          <el-form-item label="商品重量" prop="goods_weight">
            <el-input v-model="addForm.goods_weight" type="number"></el-input>
        </el-form-item>
         <el-form-item label="商品数量" prop="goods_number">
            <el-input v-model="addForm.goods_number" type="number"></el-input>
        </el-form-item>
         <el-form-item label="商品分类" prop="goods_cat">
           <template slot-scope="scope">
               <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="cateProps"
                @change="handleChange"></el-cascader>
            </template>
        </el-form-item>
    </el-tab-pane>
    <el-tab-pane label="商品参数" name="1">
        <!-- 渲染表单的item项 -->
        <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
            <!-- 多选框组 -->
            <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
               
             </el-checkbox-group>
        </el-form-item>
       </el-tab-pane>
    <el-tab-pane label="商品属性" name="2">
        <el-form-item :label="item.attr_name" v-for="item in OnlyTableData" :key="item.attr_id">
            <el-input v-model="item.attr_vals"></el-input>
        </el-form-item>
    </el-tab-pane>
    <el-tab-pane label="商品图片" name="3">
        <el-upload
       
        :action="uploadURL"
        :on-preview="handlePreview"
        :on-remove="handleRemove"
        list-type="picture"
        :headers="headerObj"
        :on-success="handleSuccess">
  <el-button size="small" type="primary">点击上传</el-button>
</el-upload>
    </el-tab-pane>
    <el-tab-pane label="商品内容" name="4">
        <!-- 富文本编辑器组件 -->
         <quill-editor v-model="addForm.goods_introduce" >
            
         </quill-editor>
         <el-button type="primary" class="addBtn" @click="add">添加商品</el-button>

    </el-tab-pane>
  </el-tabs>
  </el-form>
     </el-card>
     <!-- 预览图片对话框 -->
     <el-dialog
  title="预览图片"
  :visible.sync="previewVisible"
  width="50%"
  >
  <img :src="previewPath" alt="" class="previewImg">

</el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'

export default {
    data(){
        return{
            activeIndex:'0',
            //添加商品分类的表单数据
            addForm:{
                goods_name:'',
                goods_price:0,
                goods_number:0,
                goods_weight:0,
                //商品所属的分类数组
                goods_cat:[],
                //上传图片的路径
                pics:[],
                //商品详情内容
                goods_introduce:'',
                attrs:[]
            },
            addFormRules:{
                goods_name:[
                     {required: true,message:'请输入商品名称',trigger:'blur'}
                ],
                goods_price:[
                     {required: true,message:'请输入商品价格',trigger:'blur'}
                ],
                goods_number:[
                     {required: true,message:'请输入商品重量',trigger:'blur'}
                ],
                goods_weight:[
                     {required: true,message:'请输入商品数量',trigger:'blur'}
                ],
                goods_cat:[
                      {required: true,message:'请选择商品分类',trigger:'blur'}
                ]
            },
            //分类列表
            cateList:[],
            cateProps:{
                expandTrigger: 'hover',
                label:'cat_name',
                value:'cat_id',
                children:'children'
            },
            //动态参数列表数据
            manyTableData:[],
            //静态属性列表数据
            OnlyTableData:[],
            //上传文件地址
            uploadURL:'http://127.0.0.1:8888/api/private/v1/upload',
            //图片上传组件的headers请求对象
            headerObj:{
                Authorization:window.sessionStorage.getItem('token')
            },
            previewPath:'',
            //控制预览图片对话框的显示
            previewVisible:false
        }
    },
    created(){
        this.getCateList()
    },
    methods:{
       async getCateList(){
          const {data:res}= await this.$http.get('categories')
          if(res.meta.status!==200){
              return this.$message.error('获取商品分类失败')
          }
            this.cateList=res.data
            // console.log(this.cateList)
        },
        //级联选择器发生变化触发
        handleChange(){
            // console.log(this.addForm.goods_cat)
            if(this.addForm.goods_cat.length!==3){
                return this.addForm.goods_cat=[]
            }
        },
        beforeTabLeave(activeName, oldActiveName){
            //before-leave切换标签之前的钩子，若返回 false 或者返回 Promise 且被 reject，则阻止切换。
            if(oldActiveName==='0' && this.addForm.goods_cat.length!==3){
                this.$message.error('请先选择商品分类')
                return false
            }
        },
       async tabClicked(){
            if(this.activeIndex==='1'){
              const {data:res}= await this.$http.get(`categories/${this.cateId}/attributes`,{params:{
                    sel:'many'
                }})
                if(res.meta.status!==200){
                    this.$message.error('获取动态参数失败')
                }
                 console.log(res.data)
                 //循环遍历从后台返回的数据对象，以空格分割attr_vals中的字符串
            res.data.forEach(item => {
                item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []

               
            })
            
                 this.manyTableData=res.data
            }else if(this.activeIndex==='2'){
                 const {data:res}= await this.$http.get(`categories/${this.cateId}/attributes`,{params:{
                    sel:'only'
                }})
                if(res.meta.status!==200){
                    this.$message.error('获取静态属性失败')
                }
                 console.log(res.data)
                 this.OnlyTableData=res.data
            }
        },
        //处理图片预览效果
        handlePreview(file){
            this.previewPath=file.response.data.url
            this.previewVisible=true
        },
        //处理移除图片的操作
        handleRemove(file){
            // console.log(file)
            //获取将要删除的图片的临时路径
            const filePath=file.response.data.tmp_path
            //从pics 数组中，找到这个图片对应的索引值
            const i=this.addForm.pics.findIndex(x=>x.pic===filePath)
            //用findIndex方法返回与临时路径相同的哪一项的索引值
            //调用数组的splice 方法，把图片信息对象，从pics 数组中移除
            this.addForm.pics.splice(i,1)
            console.log(this.addForm)
        },
        //监听图片上传成功的事件
        handleSuccess(response){
            // console.log(response)
            //response是上传成功之后返回的数据
            //拼接得到一个图片的信息对象
            const picInfo={pic:response.data.tmp_path}
            //将图片信息对象，添加到pics数组中
            this.addForm.pics.push(picInfo)
            // console.log(this.addForm)
        },
        //点击按钮  添加商品
        add(){
            // console.log(this.addForm.goods_introduce)
            this.$refs.addFormRef.validate(async valid=>{
                if(!valid){
                    return this.$message.error('请填写必要的表单数据')
                }
                //添加商品 调用插件lodash中的方法
                const form= _.cloneDeep(this.addForm)
                form.goods_cat=form.goods_cat.join(',')
                // console.log(form)
                //处理动态参数
                this.manyTableData.forEach(item=>{
                    const newInfo={
                        attr_id:item.attr_id,
                        attr_value:item.attr_vals.join(' ')
                    }
                    this.addForm.attrs.push(newInfo)
                })
                //处理静态属性
                this.OnlyTableData.forEach(item=>{
                    const newInfo={
                        attr_id:item.attr_id,
                        attr_value:item.attr_vals
                    }
                    this.addForm.attrs.push(newInfo)
                })
                form.attrs=this.addForm.attrs
                console.log(form)

                //发起请求添加商品 商品的名称必须是唯一的
                const {data:res}=await this.$http.post('goods',form)
                if(res.meta.status!==201){
                    return this.$message.error('添加商品失败')
                }
                this.$message.success('添加商品成功')
                this.$router.push('/goods')
            })
        }
    },
    computed:{
        cateId(){
            if(this.addForm.goods_cat.length===3){
                return this.addForm.goods_cat[2]
            }
                return null
        }
    }
}
</script>


<style lang="less" scoped>
.el-checkbox{
    margin-right: 8px !important;
}
.previewImg{
    width: 100%;
}
.addBtn{
    margin-top: 15px;
}
</style>